Untested - Sweet and Sour Celery

From Ben's fragment of a Pennsylvania Dutch cookery book, pg 17
http://www.geniuskitchen.com/recipe/amish-creamy-coleslaw-with-boiled-dressing-118579

2 cups diced celery
1 tsp salt
1 egg
2 Tbsps flour
2 Tbsps sugar
2 Tbsps vinegar
1 cup water
1/4 cup sour cream

1. Put the celery in a large shallow pan with the salt. Just cover with water and bring to a boil, then a quick simmer, and let cook until all the liquid has evaporated. The celery should be completely cooked at this point.
2. Meanwhile, in a saucepan, beat the eggs, then beat in the sugar, flour and salt.
3. In a measuring cup combine the water and vinegar, then beat into the egg mixture
4. Cook over low heat, stirring constantly, until thick - about 5-8 minutes. It will be very lumpy, but don't worry, just beat it into smoothness.
5. When very thick, remove from heat and beat in the crème fraîche.
6. Pour this over the celery, reheat and then serve.